excel读入数据库

POI3.9效率大幅度提高，支持xls以及xlsx。

首先需要POI的JAR包，MAVEN配置如下：

<!-- excel start -->
		<dependency>
			<groupId>org.apache.poi</groupId>
			<artifactId>poi</artifactId>
			<version>3.9</version>
		</dependency>

		<dependency>
			<groupId>org.apache.poi</groupId>
			<artifactId>poi-ooxml</artifactId>
			<version>3.9</version>
		</dependency>

		<dependency>
			<groupId>org.apache.poi</groupId>
			<artifactId>poi-ooxml-schemas</artifactId>
			<version>3.9</version>
		</dependency>

		<dependency>
			<groupId>org.apache.xmlbeans</groupId>
			<artifactId>xmlbeans</artifactId>
			<version>2.6.0</version>
		</dependency>

		<dependency>
			<groupId>dom4j</groupId>
			<artifactId>dom4j</artifactId>
			<version>1.6.1</version>
		</dependency>
<!-- excel end -->

　　　　　　　　　　<dependency>
			<groupId>mysql</groupId>
			<artifactId>mysql-connector-java</artifactId>
			<version>5.1.35</version>
		</dependency>

		<dependency>
			<groupId>org.mybatis</groupId>
			<artifactId>mybatis</artifactId>
			<version>3.1.1</version>
		</dependency>
		
		<dependency>
			<groupId>org.mybatis</groupId>
			<artifactId>mybatis-spring</artifactId>
			<version>1.2.2</version>
		</dependency>
		
		<dependency>
			<groupId>com.mchange</groupId>
			<artifactId>c3p0</artifactId>
			<version>0.9.5-pre10</version>
		</dependency>
		
		<dependency>
			<groupId>org.springframework</groupId>
			<artifactId>spring-tx</artifactId>
			<version>${springversion}</version>
			<type>jar</type>
			<scope>compile</scope>
		</dependency>
		<dependency>
			<groupId>org.springframework</groupId>
			<artifactId>spring-jdbc</artifactId>
			<version>${springversion}</version>
			<type>jar</type>
			<scope>compile</scope>
		</dependency>
		<dependency>
			<groupId>org.springframework</groupId>
			<artifactId>spring-aop</artifactId>
			<version>${springversion}</version>
			<type>jar</type>
			<scope>compile</scope>
		</dependency>
		<dependency>
			<groupId>org.springframework</groupId>
			<artifactId>spring-beans</artifactId>
			<version>${springversion}</version>
			<type>jar</type>
			<scope>compile</scope>
		</dependency>
		<dependency>
			<groupId>org.springframework</groupId>
			<artifactId>spring-context</artifactId>
			<version>${springversion}</version>
			<type>jar</type>
			<scope>compile</scope>
		</dependency>
		<dependency>
			<groupId>org.springframework</groupId>
			<artifactId>spring-context-support</artifactId>
			<version>${springversion}</version>
			<type>jar</type>
			<scope>compile</scope>
		</dependency>
		<dependency>
			<groupId>org.springframework</groupId>
			<artifactId>spring-core</artifactId>
			<version>${springversion}</version>
			<type>jar</type>
			<scope>compile</scope>
		</dependency>
		<dependency>
			<groupId>org.springframework</groupId>
			<artifactId>spring-expression</artifactId>
			<version>${springversion}</version>
			<type>jar</type>
			<scope>compile</scope>
		</dependency>
		<!-- cglib -->
		<dependency>
			<groupId>cglib</groupId>
			<artifactId>cglib</artifactId>
			<version>2.2.2</version>
		</dependency>

ReadExcel.java

package excel;

import java.io.FileInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.util.ArrayList;
import java.util.List;

import mysql.mapper.StudentMapper;

import org.apache.poi.hssf.usermodel.HSSFCell;
import org.apache.poi.hssf.usermodel.HSSFRow;
import org.apache.poi.hssf.usermodel.HSSFSheet;
import org.apache.poi.hssf.usermodel.HSSFWorkbook;
import org.apache.poi.xssf.usermodel.XSSFCell;
import org.apache.poi.xssf.usermodel.XSSFRow;
import org.apache.poi.xssf.usermodel.XSSFSheet;
import org.apache.poi.xssf.usermodel.XSSFWorkbook;
import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;

import Student.Student;

public class ReadExcel {

	private StudentMapper studentMapper;
	
	public ReadExcel(){
		ApplicationContext ctx = new ClassPathXmlApplicationContext("applicationContext-dao.xml");
		studentMapper = (StudentMapper) ctx.getBean("studentMapper");
	}
	
	public List<Student> readExcel(String path) throws IOException {
		if (path == null || path.equals("")) {
			return null;
		}
		String postfix = getPostfix(path);
		if (!"".equals(postfix)) {
			if ("xls".equals(postfix)) {
				return readXls(path);
			} else if ("xlsx".equals(path)) {
				return readXlsx(path);
			}
		} else {
			System.out.println(" : Not the Excel file!");
		}
		return null;
	}

	public List<Student> readXlsx(String path) throws IOException {
		InputStream is = new FileInputStream(path);
		XSSFWorkbook xssfWorkbook = new XSSFWorkbook(is);
		Student student = null;
		List<Student> list = new ArrayList<Student>();
		for (int numSheet = 0; numSheet < xssfWorkbook.getNumberOfSheets(); numSheet++) {
			XSSFSheet xssfSheet = xssfWorkbook.getSheetAt(numSheet);
			if (xssfSheet == null) {
				continue;
			}
			for (int rowNum = 1; rowNum <= xssfSheet.getLastRowNum(); rowNum++) {
				XSSFRow xssfRow = xssfSheet.getRow(rowNum);
				if (xssfRow != null) {
					student = new Student();
					XSSFCell no = xssfRow.getCell(0);
					XSSFCell name = xssfRow.getCell(1);
					XSSFCell age = xssfRow.getCell(2);
					XSSFCell score = xssfRow.getCell(3);
					student.setNo(getValue(no));
					student.setName(getValue(name));
					student.setAge(getValue(age));
					student.setScore(Float.valueOf(getValue(score)));
					studentMapper.insert(student);
					list.add(student);
				}
			}
		}
		return list;
	}

	public List<Student> readXls(String path) throws IOException {
		System.out.println("processing...");
		InputStream is = new FileInputStream(path);
		HSSFWorkbook hssfWorkbook = new HSSFWorkbook(is);
		Student student = null;
		List<Student> list = new ArrayList<Student>();
		for (int numSheet = 0; numSheet < hssfWorkbook.getNumberOfSheets(); numSheet++) {
			HSSFSheet hssfSheet = hssfWorkbook.getSheetAt(numSheet);
			if (hssfSheet == null) {
				continue;
			}
			for (int rowNum = 1; rowNum <= hssfSheet.getLastRowNum(); rowNum++) {
				HSSFRow hssfRow = hssfSheet.getRow(rowNum);
				if (hssfRow != null) {
					student = new Student();
					HSSFCell no = hssfRow.getCell(0);
					HSSFCell name = hssfRow.getCell(1);
					HSSFCell age = hssfRow.getCell(2);
					HSSFCell score = hssfRow.getCell(3);
					student.setNo(getValue(no));
					student.setName(getValue(name));
					student.setAge(getValue(age));
					student.setScore(Float.valueOf(getValue(score)));
					studentMapper.insert(student);
					list.add(student);
				}
			}
		}
		return list;
	}

	@SuppressWarnings("static-access")
	private String getValue(XSSFCell xssfRow) {
		if (xssfRow.getCellType() == xssfRow.CELL_TYPE_BOOLEAN) {
			return String.valueOf(xssfRow.getBooleanCellValue());
		} else if (xssfRow.getCellType() == xssfRow.CELL_TYPE_NUMERIC) {
			return String.valueOf(xssfRow.getNumericCellValue());
		} else {
			return String.valueOf(xssfRow.getStringCellValue());
		}
	}

	@SuppressWarnings("static-access")
	private String getValue(HSSFCell hssfCell) {
		if (hssfCell.getCellType() == hssfCell.CELL_TYPE_BOOLEAN) {
			return String.valueOf(hssfCell.getBooleanCellValue());
		} else if (hssfCell.getCellType() == hssfCell.CELL_TYPE_NUMERIC) {
			return String.valueOf(hssfCell.getNumericCellValue());
		} else {
			return String.valueOf(hssfCell.getStringCellValue());
		}
	}
	
	public String getPostfix(String path){
		if(path == null || path.equals(" ")){
			return "";
		}
		if(path.contains(".")){
			return path.substring(path.lastIndexOf(".") + 1, path.length());
		}
		return "";
	}
}

applicationContext-dao.xml

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xmlns:context="http://www.springframework.org/schema/context"
    xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd
        http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-4.0.xsd">

    <!-- 配置数据源, 整合其他框架, 事务等. -->
    <!-- 加载配置文件 -->
    <context:property-placeholder location="classpath:db.properties" />

    <!-- 数据源，使用dbcp -->
    <bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource"
        destroy-method="close">
        <property name="driverClass" value="${jdbc.driverClass}" />
        <property name="jdbcUrl" value="${jdbc.jdbcUrl}" />
        <property name="user" value="${jdbc.user}" />
        <property name="password" value="${jdbc.password}" />
        <property name="minPoolSize" value="${jdbc.miniPoolSize}" />
        <property name="maxPoolSize" value="${jdbc.maxPoolSize}" />
        <property name="initialPoolSize" value="${jdbc.initialPoolSize}" />
        <property name="maxIdleTime" value="${jdbc.maxIdleTime}" />
        <property name="acquireIncrement" value="${jdbc.acquireIncrement}" />

        <property name="acquireRetryAttempts" value="${jdbc.acquireRetryAttempts}" />
        <property name="acquireRetryDelay" value="${jdbc.acquireRetryDelay}" />
        <property name="testConnectionOnCheckin" value="${jdbc.testConnectionOnCheckin}" />
        <property name="automaticTestTable" value="${jdbc.automaticTestTable}" />
        <property name="idleConnectionTestPeriod" value="${jdbc.idleConnectionTestPeriod}" />
        <property name="checkoutTimeout" value="${jdbc.checkoutTimeout}" />

    </bean>


    <!-- sqlSessinFactory -->
    <bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
        <!-- 加载mybatis的配置文件 -->
        <property name="configLocation" value="classpath:SqlMapConfig.xml" />
        <!-- 数据源 -->
        <property name="dataSource" ref="dataSource" />
    </bean>

    <!-- mapper配置 MapperFactoryBean：根据mapper接口生成代理对象，和下面方式二选一 -->
    <!-- <bean id="userMapper" class="org.mybatis.spring.mapper.MapperFactoryBean"> 
        <property name="mapperInterface" value="com.alibaba.mapper.UserMapper"/> 
        <property name="sqlSessionFactory" ref="sqlSessionFactory"/> 
    </bean> -->
        
    <!-- mapper批量扫描，从mapper包中扫描出mapper接口，自动创建代理对象并且在spring容器中注册 遵循规范：将mapper.java和mapper.xml映射文件名称保持一致，且在一个目录 
        中 自动扫描出来的mapper的bean的id为mapper类名（首字母小写） -->
    <!-- 指定扫描的包名 如果扫描多个包，每个包中间使用半角逗号分隔 -->
    <bean class="org.mybatis.spring.mapper.MapperScannerConfigurer"> 
        <property name="basePackage" value="station.mapper"/> 
        <property name="sqlSessionFactoryBeanName" value="sqlSessionFactory"/> 
    </bean>

</beans>

db.properties

jdbc.driverClass=com.mysql.jdbc.Driver
jdbc.jdbcUrl = jdbc:mysql://localhost:3306/test
jdbc.user = root
jdbc.password = 123456
jdbc.miniPoolSize = 1
jdbc.maxPoolSize = 20
jdbc.initialPoolSize = 1
jdbc.maxIdleTime = 25000
jdbc.acquireIncrement = 1

jdbc.acquireRetryAttempts = 30
jdbc.acquireRetryDelay = 1000
jdbc.testConnectionOnCheckin = true
jdbc.automaticTestTable = c3p0TestTable
jdbc.idleConnectionTestPeriod = 18000
jdbc.checkoutTimeout=3000

SqlMapConfig.xml

<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE configuration
PUBLIC "-//mybatis.org//DTD Config 3.0//EN"
"http://mybatis.org/dtd/mybatis-3-config.dtd">
<configuration>

    <settings>
        <!-- 打开延迟加载 的开关 -->
        <setting name="lazyLoadingEnabled" value="true" />
        <!-- 将积极加载改为消极加载即按需要加载 -->
        <setting name="aggressiveLazyLoading" value="false" />
        <!-- 开启二级缓存 -->
        <setting name="cacheEnabled" value="true" />
    </settings>
    
    <!-- 别名定义 -->
    <typeAliases>

        <!-- 批量别名定义 指定包名，mybatis自动扫描包中的po类，自动定义别名，别名就是类名（首字母大写或小写都可以） -->
        <package name="Student" />

    </typeAliases>

    <!-- 加载 映射文件 -->
    <!-- <mappers> -->
        <!-- <mapper resource="mybatis/UserMapper.xml" /> -->

        <!-- 批量加载mapper 指定mapper接口的包名，mybatis自动扫描包下边所有mapper接口进行加载 遵循一些规范：需要将mapper接口类名和mapper.xml映射文件名称保持一致，且在一个目录 
            中 上边规范的前提是：使用的是mapper代理方法 和spring整合后，使用mapper扫描器，这里不需要配置了 -->
        <!-- <package name="mysql.mapper"/>  -->

    <!-- </mappers> -->

</configuration>

测试类：

package client;

import java.io.IOException;
import java.util.List;

import Student.Student;

import excel.ReadExcel;

public class Client {
    
    public static void main(String[] args) throws IOException{
        List<Student> list = new ReadExcel().readExcel("D:\student.xls");
        if(list != null){
            for(Student student:list){
                System.out.println(student);
            }
        }
    }
    
}

数据库设计

项目结构：